notifications: fix (notes) link

lib/components/notifications.js

@@ -45,7 +45,7 @@ export default class Notifications extends Component {
             { ' ' }
             (<a
               style={{ color: '#fff' }}
-              target="_blank"
+              onClick={ (ev) => { window.require('electron').shell.openExternal(ev.target.href); ev.preventDefault(); } }
               href={`https://github.com/zeit/hyperterm/releases/tag/${this.props.updateVersion}`}>notes</a>).
             { ' ' }
             <a style={{